Patent application title: SYSTEM AND METHOD FOR RE-BUILDING A PUMP

Abstract:

In accordance with one embodiment of the present disclosure, a method may
include installing a first seal around a motor shaft. The method may also
include installing a second seal around the motor shaft, wherein the
second seal and the first seal may form a hydrodynamic seal when the
motor shaft rotates. The method may further include installing a spacer
in-between the second seal and the first seal.

Claims:

1. A method, comprising:installing a first seal around a motor
shaft;installing a second seal around the motor shaft, the second seal
and the first seal forming a hydrodynamic seal when the motor shaft
rotates; andinstalling a spacer in-between the second seal and the first
seal.

3. The method of claim 1, wherein the motor shaft comprises a motor shaft
of a cooling liquid electron tube pump for a radar system for a Patriot
missile system.

4. The method of claim 1, further comprising installing one or more shims
around the motor shaft.

5. The method of claim 4, wherein the installing the one or more shims
around the motor shaft comprises installing at least a first shim around
the motor shaft in a location in-between a motor coupled to the motor
shaft and a housing surrounding the motor shaft.

6. The method of claim 4, wherein the installing the one or more shims
around the motor shaft comprises:determining a size of at least a second
shim based on at least a height of the first seal; andinstalling the at
least the second shim around the motor shaft in a location either
in-between the first seal and a housing surrounding the motor shaft or
in-between the spacer and a shoulder of the motor shaft.

7. The method of claim 4, wherein the installing the one or more shims
around the motor shaft comprises installing at least a third shim around
the motor shaft in a location in-between the second seal and an impeller
installed around the motor shaft.

8. The method of claim 1, further comprising:installing a first high
temperature o-ring around the motor shaft in a location in-between the
first seal and a housing surrounding the motor shaft; andinstalling a
second high temperature o-ring around the motor shaft in a location
in-between the second seal and at least a third shim, wherein the at
least the third shim is installed around the motor shaft in a location
in-between the second seal and an impeller installed around the motor
shaft.

9. The method of claim 1, wherein the installing the second seal around
the motor shaft comprises applying an amount of a molybdenum grease to
the second seal on an area of the second seal that contacts the first
seal.

10. The method of claim 1, further comprising:installing an impeller
around the motor shaft; andinstalling a case hardened pin into the
impeller in order to install the impeller around the motor shaft.

11. A system, comprising:a motor shaft coupled to a motor, the motor shaft
operable to rotate;a first seal coupled around the motor shaft;a second
seal coupled around the motor shaft, the second seal and the first seal
operable to form a hydrodynamic seal when the motor shaft rotates; anda
spacer coupled around the motor shaft in a location in-between the second
seal and the first seal.

12. The system of claim 11, wherein the motor shaft comprises a motor
shaft of a cooling liquid electron tube pump.

13. The system of claim 11, wherein the motor shaft comprises a motor
shaft of a cooling liquid electron tube pump for a radar system for a
Patriot missile system.

14. The system of claim 11, further comprising one or more shims coupled
around the motor shaft.

15. The system of claim 14, wherein the one or more shims comprises at
least a first shim coupled around the motor shaft in a location
in-between the motor and a housing surrounding the motor shaft.

16. The system of claim 14, wherein the one or more shims comprises at
least a second shim coupled around the motor shaft in a location either
in-between the first seal and a housing surrounding the motor shaft or
in-between the spacer and a shoulder of the motor shaft, wherein a size
of the at least the second shim is based on at least a height of the
first seal.

17. The system of claim 14, wherein the one or more shims comprises at
least a third shim coupled around the motor shaft in a location
in-between the second seal and an impeller coupled around the motor
shaft.

18. The system of claim 11, further comprising:a first high temperature
o-ring coupled around the motor shaft in a location in-between the first
seal and a housing surrounding the motor shaft; anda second high
temperature o-ring coupled around the motor shaft in a location
in-between the second seal and at least a third shim, wherein the at
least the third shim is coupled around the motor shaft in a location
in-between the second seal and an impeller coupled around the motor
shaft.

19. The system of claim 11, wherein the second seal comprises at least an
amount of a molybdenum grease on the second seal on an area of the second
seal that contacts the first seal.

20. A method, comprising:installing a first seal around a motor
shaft;installing a second seal around the motor shaft, the second seal
and the first seal forming a hydrodynamic seal when the motor shaft
rotates;installing a spacer in-between the second seal and the first
seal;installing one or more shims around the motor shaft;installing a
first high temperature o-ring around the motor shaft in a location
in-between the first seal and a housing surrounding the motor
shaft;installing a second high temperature o-ring around the motor shaft
in a location in-between the second seal and at least a third shim,
wherein the at least the third shim is installed around the motor shaft
in a location in-between the second seal and an impeller installed around
the motor shaft;installing the impeller;installing a case hardened pin
into the impeller in order to install the impeller around the motor
shaft; andwherein:the motor shaft comprises a motor shaft of a cooling
liquid electron tube pump for a radar system for a Patriot missile
system;the installing the one or more shims around the motor shaft
comprises installing at least a first shim around the motor shaft in a
location in-between a motor coupled to the motor shaft and the
housing;the installing the one or more shims around the motor shaft
comprises:determining a size of at least a second shim based on at least
a height of the first seal; andinstalling the at least the second shim
around the motor shaft in a location either in-between the first seal and
the housing or in-between the spacer and a shoulder of the motor
shaft;the installing the one or more shims around the motor shaft
comprises installing the at least the third shim; andthe installing the
second seal around the motor shaft comprises applying an amount of a
molybdenum grease to the second seal on an area of the second seal that
contacts the first seal.

[0002]The present disclosure relates generally to pumps and more
particularly to a system and method for re-building a pump.

BACKGROUND

[0003]Typically, a pump includes a seal for preventing coolant from
contacting the pump's motor. The cooling liquid electron tube (CLET) pump
for the radar system for the Patriot missile system includes such a seal.
Such seals, however, are deficient.

SUMMARY

[0004]In accordance with one embodiment of the present disclosure, a
method may include installing a first seal around a motor shaft. The
method may also include installing a second seal around the motor shaft,
wherein the second seal and the first seal may form a hydrodynamic seal
when the motor shaft rotates. The method may further include installing a
spacer in-between the second seal and the first seal.

[0005]Numerous technical advantages are provided according to various
embodiments of the present disclosure. Particular embodiments of the
disclosure may exhibit none, some, or all of the following advantages
depending on the implementation. In certain embodiments, a spacer may be
installed in-between a first seal and a second seal. As such, the spacer
may dampen the vibrations emanating from the motor shaft. Accordingly,
the second seal may be able to form a better hydrodynamic seal with the
first seal, thereby minimizing coolant leakage.

[0006]In another embodiment, one or more shims may be installed around the
motor shaft. As such, the shims may be able to compensate for various
manufacturing inconsistencies in the elements of the pump system.
Accordingly, coolant leakage may be minimized.

[0007]In another embodiment, a first high temperature o-ring and a second
high temperature o-ring may be installed around the motor shaft. By
installing high temperature o-rings, the o-rings may be able to withstand
the temperatures inside the pump system. Accordingly, coolant leakage may
be minimized.

[0008]Other technical advantages of the present disclosure will be readily
apparent to one skilled in the art from the following figures,
descriptions, and claims. Moreover, while specific advantages have been
enumerated above, various embodiments may include all, some, or none of
the enumerated advantages.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]For a more complete understanding of the present disclosure and its
advantages, reference is now made to the following descriptions, taken in
conjunction with the accompanying drawings, in which:

[0010]FIG. 1 is a two-dimensional cut-out diagram illustrating one
embodiment of a pump system for pumping a coolant from a pump manifold
well in order to be used to cool another system;

[0011]FIGS. 2-17 illustrate particular embodiments of various calculations
and installation steps for the pump system of FIG. 1; and

[0012]FIG. 18 illustrates one embodiment of a method for re-building one
embodiment of the pump system of FIG. 1.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

[0013]It should be understood at the outset that, although example
implementations of embodiments of the invention are illustrated below,
the present invention may be implemented using any number of techniques,
whether currently known or not. The present invention should in no way be
limited to the example implementations, drawings, and techniques
illustrated below. Additionally, the drawings are not necessarily drawn
to scale.

[0014]FIG. 1 is a two-dimensional cut-out diagram illustrating one
embodiment of a pump system 10 for pumping a coolant from a pump manifold
well in order to be used to cool another system. In one embodiment, the
pump system 10 may include a spacer 46 located in-between a first seal 38
and a second seal 50. As such, the spacer 46 may dampen vibrations
emanating from a motor shaft 22 as it rotates, allowing the first seal 38
and second seal 50 to form a better hydrodynamic seal. Accordingly,
coolant leakage may be minimized. In another embodiment, the pump system
10 may further include one or more shims that may compensate for various
height differences throughout the pump system 10. Accordingly, coolant
leakage may be further minimized. Furthermore, the pump system 10 may
operate for a longer period.

[0015]As is discussed above, FIG. 1 is a two-dimensional cut-out diagram
illustrating one embodiment of the pump system 10. In order to provide a
simplified view of the pump system 10, various elements of the pump
system 10 may be illustrated as only being located on a single side of
the motor shaft 22, even though these elements may completely or
partially surround the entire motor shaft 22. For example, although the
housing 30 is illustrated as only being located on one side of the motor
shaft 22, the housing 30, in one embodiment, may completely or partially
surround the motor shaft 22.

[0016]The pump system 10 may include any suitable pump system for pumping
coolant from a pump manifold well in order to be used to cool another
system. In one embodiment, the pump system may include a cooling liquid
electron tube (CLET) pump. For example, the pump system 10 may be a CLET
pump for a radar system for a Patriot missile system. As such, the pump
system 10 may pump coolant from a pump manifold well in order to be used
to cool components of the radar system of the Patriot missile system. In
further embodiments, the pump system 10 may include any other suitable
pump system. For example, the pump system 10 may pump coolant in order to
be used to cool an automobile engine, an oil rig motor, or any other
suitable device that generates heat. In a further embodiment, the pump
system 10 may include any suitable pump system for pumping coolant in
order to be used with another system. For example, the coolant may be
used by the other system for any suitable purpose. In such an example,
the pump system 10 may pump the coolant so that the coolant may be used
by the other system as, for example, a lubricant, an additive for a
product, fuel for operation, or any other suitable purpose that may
require a coolant.

[0017]In one embodiment, the coolant pumped by the pump system 10 may
include any suitable coolant. For example, the coolant may include any
suitable coolant for cooling a radar system of a Patriot missile system,
an automobile engine, an oil rig motor, or any other suitable device that
generates heat. In one embodiment, the coolant may include Ethylene
Glycol. In another embodiment, the coolant may include any other suitable
liquid. For example, the coolant may include water, oil, any other
suitable liquid, or any combination of liquids. In a further embodiment,
the coolant may include any other suitable liquid that may be used by
another system.

[0018]According to the illustrated embodiment, the pump system 10 includes
a motor 14, a first shim 18, the motor shaft 22, a slush plate 26, the
housing 30, a second shim 34, the first seal 38, a first high temperature
o-ring 42, the spacer 46, the second seal 50, a second high temperature
o-ring 54, a third shim 58, an impeller 62, a fourth shim 66, and
mounting hardware 70.

[0019]The motor 14 may include any device that causes the motor shaft 22
to rotate. For example, the motor 14 may include any suitable rotary
device that may create a rotational force. In one embodiment, the motor
14 may include any suitable rotary device for use in a CLET pump for a
radar system for a Patriot missile system. In another embodiment, the
motor 14 may include any other suitable rotary device. For example, the
motor 14 may be a rotary device for a pump that provides coolants to an
automobile engine, an oil rig motor, or any other suitable device that
generates heat. In one embodiment, the motor 14 may include a rotary
device of any suitable size and any suitable power for causing the motor
shaft 22 to rotate so that the coolant (not shown) may be pumped up from
the pump manifold well (not shown) into the housing 30. In one
embodiment, the motor 14 may cause the motor shaft 22 to rotate at any
suitable speed. For example, the motor 14 may cause the motor shaft 22 to
rotate at 1,000 revolutions per minute (rpm), 1,500 rpm, 2,000 rpm, 2,500
rpm, or any other suitable rpm.

[0020]The first shim 18 may include any suitable element for altering the
vertical location of the housing 30. In one embodiment, the first shim 18
may include any suitable shim for use in a CLET pump for a radar system
for a Patriot missile system. In another embodiment, the first shim 18
may include any other shim. For example, the first shim 18 may be a shim
for a pump that provides coolants to an automobile engine, an oil rig
motor, or any other suitable device that generates heat. In one
embodiment, the first shim 18 may be installed in-between the housing 30
and the motor 14. In such an embodiment, the first shim 18 may alter the
vertical location of the housing 30 in order to compensate for height
differences in the motor shaft 22. For example, manufacturing
inconsistencies may have caused the motor shaft 22 to be too tall with
regard to the housing 30. In such an example, the first shim 18 may lower
the location of the housing 30, causing the housing 30 to more properly
fit the motor shaft 22. In one embodiment, the first shim 18 may include
any suitable size, shape, or material type. In a further embodiment, the
size of the first shim 18 may be calculated, as is discussed in FIG. 6.
In one embodiment, the size of the first shim 18 may refer to the
thickness of the first shim 18.

[0021]The motor shaft 22 may include any device that may be rotated in
order to cause coolant to be pumped into the housing 30 so that it may be
provided to another system. In one embodiment, the motor shaft 22 may
include any suitable motor shaft for use in a CLET pump for a radar
system for a Patriot missile system. In another embodiment, the motor
shaft 22 may include any other suitable motor shaft. For example, the
motor shaft 22 may be a motor shaft for a pump that provides coolants to
an automobile engine, an oil rig motor, or any other suitable device that
generates heat. In one embodiment, the motor shaft 22 may be rotated at
any suitable rpm, as is discussed above.

[0022]The slush plate 26 may include any suitable device that surrounds or
partially surrounds the motor shaft 22. In one embodiment, the slush
plate 26 may include any suitable slush plate for use in a CLET pump for
a radar system for a Patriot missile system. In another embodiment, the
slush plate 26 may include any other suitable slush plate. For example,
the slush plate 26 may be a slush plate for a pump that provides coolants
to an automobile engine, an oil rig motor, or any other suitable device
that generates heat. In one embodiment, the slush plate 26 may include
any suitable size, any suitable shape, and any suitable material type.

[0023]The housing 30 may include any suitable device for surrounding the
motor shaft 22. In one embodiment, the housing 30 may include any
suitable housing for use in a CLET pump for a radar system for a Patriot
missile system. In another embodiment, the housing 30 may include any
other suitable housing. For example, the housing 30 may be a housing for
a pump that provides coolants to an automobile engine, an oil rig motor,
or any other suitable device that generates heat. In one embodiment, the
housing 30 may further provide a channel around the motor shaft 22 for
enclosing any amount of the coolant that is pumped up into the housing 30
by the pump system 10. In a further embodiment, the housing 30 may
include one or more exit areas (shown in FIG. 17) that allow the coolant
to exit the housing 30 in order to be provided to another system. In a
further embodiment, the housing 30 may further include a leakage shaft
(shown in FIG. 3) that may allow any coolant that leaks past the first
seal 38 to exit the housing 30. As such, the coolant may exit the housing
30 prior to coming in contact with the motor 14.

[0024]The second shim 34 may include any suitable element for altering the
vertical location of the first seal 38 or the spacer 46. In one
embodiment, the second shim 34 may include any suitable shim for use in a
CLET pump for a radar system for a Patriot missile system. In another
embodiment, the second shim 34 may include any other suitable shim. For
example, the second shim 34 may be a shim for a pump that provides
coolants to an automobile engine, an oil rig motor, or any other suitable
device that generates heat.

[0025]In one embodiment, the second shim 34 may be installed in-between
the housing 30 and the first seal 38 in order to vertically displace the
first seal 38 in relation to the spacer 46, as is illustrated in FIG. 1.
In another embodiment, the second shim 34 may be installed in-between the
spacer 46 and a shoulder 44 of the motor shaft 22 in order to vertically
displace the spacer 46 in relation to the first seal 38, as is
illustrated in FIG. 9. According to one embodiment, the second shim 34
may alter the vertical location of the first seal 38 or the spacer 46 in
order to compensate for height differences in the pump system 10. For
example, manufacturing inconsistencies may have caused the various
elements of the pump system 10 to be bigger than originally designed for.
In one embodiment, such inconsistencies may cause the first seal 38 and
the second seal 50 to form a hydrodynamic seal that may leak. In one
embodiment, altering the vertical location of either the first seal 38 or
the spacer 46 may cause the first seal 38 and the second seal 50 to form
a better hydrodynamic seal. As such, coolant leakage may be minimized. In
one embodiment, the second shim 34 may include any suitable size, shape,
or material type. In a further embodiment, the size of the second shim 34
may be calculated, as is discussed in FIG. 9. In another embodiment, the
location where the second shim 34 is installed in the pump system 10 may
also be calculated, as is discussed in FIG. 9. In one embodiment, the
size of the second shim 34 may refer to the thickness of the second shim
34.

[0026]The first seal 38 may include any device that may form a
hydrodynamic seal with the second seal 50. In one embodiment, the first
seal 38 may include any suitable seal for use in a CLET pump for a radar
system for a Patriot missile system. In another embodiment, the first
seal 38 may include any other suitable seal. For example, the first seal
38 may be a seal for a pump that provides coolants to an automobile
engine, an oil rig motor, or any other suitable device that generates
heat. In one embodiment, the first seal 38 may include a contractible
portion 40 that may contract in order to form the hydrodynamic seal with
the second seal 50. In one embodiment, the contractible portion 40 may
contract when the pump system 10 is loaded. In one embodiment, the
contractible portion 40 may include any suitable contractible material
type. For example, the contractible portion 40 may include a carbon based
element coupled to contractible springs.

[0027]The first high temperature o-ring 42 may include any suitable
o-ring. In one embodiment, the first high temperature o-ring 42 may
include any suitable o-ring for use in a CLET pump for a radar system for
a Patriot missile system. In another embodiment, the first high
temperature o-ring 42 may include any other suitable o-ring. For example,
the first high temperature o-ring 42 may be an o-ring for a pump that
provides coolants to an automobile engine, an oil rig motor, or any other
suitable device that generates heat. In one embodiment, the first high
temperature o-ring 42 may include any suitable high temperature material.
For example, the first high temperature o-ring 42 may include a material
that may be used in a temperature range of 300 to 400° Fahrenheit.
In such an example, the first high temperature o-ring 42 may include
VITON®. In one embodiment, the first high temperature o-ring 42 may
be installed in-between the housing 30 and the first seal 38, as is
illustrated in FIG. 1. In one embodiment, the first high temperature
o-ring 42 may be installed in the pump system 10 after being lubricated
first. For example, the first high temperature o-ring 42 may be
lubricated with any suitable barium based petroleum grease, such as
Parker grease.

[0028]The spacer 46 may include any suitable device for dampening
vibrations from the motor shaft 22 while the motor shaft 22 is being
rotated. In one embodiment, the spacer 46 may include any suitable spacer
for use in a CLET pump for a radar system for a Patriot missile system.
In another embodiment, the spacer 46 may include any other suitable
spacer. For example, the spacer 46 may be a spacer for a pump that
provides coolants to an automobile engine, an oil rig motor, or any other
suitable device that generates heat. In one embodiment, the spacer 46 may
include any suitable material type. For example, the spacer 46 may
include a synthetic polymer, such as TEFLON®. In one embodiment, the
spacer 46 may be installed around the motor shaft 22 at the shoulder 44
of the motor shaft 22. In one embodiment, by installing the spacer 46 at
the shoulder 44 of the motor shaft 22, the spacer 46 may dampen the
vibrations emanating from the motor shaft 22. In one embodiment, by
dampening the vibrations, the second seal 50 may be able to create a
better hydrodynamic seal with the first seal 38. As such, coolant leakage
may be minimized.

[0029]The second seal 50 may include any device that may form a
hydrodynamic seal with the first seal 38. In one embodiment, the second
seal 50 may include any suitable seal for use in a CLET pump for a radar
system for a Patriot missile system. In another embodiment, the second
seal 50 may include any other suitable seal. For example, the second seal
50 may be a seal for a pump that provides coolants to an automobile
engine, an oil rig motor, or any other suitable device that generates
heat. In one embodiment, the second seal 50 may be lubricated prior to
being installed around the motor shaft 22. For example, a molybdenum
grease, such as MOLYKOTE® grease, may be applied to an area of the
second seal 50 that may contact the first seal 38. In one embodiment, the
molybdenum grease may be applied to an area of the second seal that may
contact the contractible portion 40 of the first seal 38 while forming a
hydrodynamic seal. In another embodiment, the second seal 50 may be
rotated. For example, the rotation of the motor shaft 22 may cause the
second seal 50 to rotate also. In one embodiment, the high speed rotation
of the second seal 50 may allow the second seal 50 to form a hydrodynamic
seal with the first seal 38.

[0030]The second high temperature o-ring 54 may include any suitable
o-ring. In one embodiment, the second high temperature o-ring 54 may
include any suitable o-ring for use in a CLET pump for a radar system for
a Patriot missile system. In another embodiment, the second high
temperature o-ring 54 may include any other suitable o-ring. For example,
the second high temperature o-ring 54 may be an o-ring for a pump that
provides coolants to an automobile engine, an oil rig motor, or any other
suitable device that generates heat. In one embodiment, the second high
temperature o-ring 54 may include any suitable high temperature material.
For example, the second high temperature o-ring 54 may include a material
that may be used in a temperature range of 300 to 400° Fahrenheit.
In such an example, the second high temperature o-ring 54 may include
VITON®. In one embodiment, the second high temperature o-ring 54 may
be installed in-between the second seal 50 and the third shim 58, as is
illustrated in FIG. 1. In one embodiment, the second high temperature
o-ring 54 may be installed in the pump system 10 after being lubricated
first. For example, the second high temperature o-ring 54 may be
lubricated with any suitable barium based petroleum grease, such as
Parker grease.

[0031]The third shim 58 may include any suitable element for altering the
vertical location of the impeller 62. In one embodiment, the third shim
58 may include any suitable shim for use in a CLET pump for a radar
system for a Patriot missile system. In another embodiment, the third
shim 58 may include any other suitable shim. For example, the third shim
58 may be a shim for a pump that provides coolants to an automobile
engine, an oil rig motor, or any other suitable device that generates
heat.

[0032]In one embodiment, the third shim 58 may be installed in-between the
second seal 50 and the impeller 62 in order to vertically displace the
impeller 62, as is illustrated in FIG. 1. In one embodiment, by
vertically displacing the impeller 62, the third shim 58 may allow the
pump system 10 to compensate for height differences in the pump system
10. For example, manufacturing inconsistencies may have caused various
elements of the pump system 10 to be bigger than originally designed for.
In one embodiment, if the impeller 62 is not vertically displaced enough
(e.g., lowered in FIG. 1), the impeller 62 may not properly pump the
coolant into the housing 30. In a further embodiment, if the impeller 62
is vertically displaced too much, the impeller 62 may run into the bottom
of the pump manifold well (not shown) while operating, causing the
impeller 62 to be damaged. In one embodiment, the third shim 58 may
include any suitable size, shape, or material type. In a further
embodiment, the size of the third shim 58 may be calculated, as is
discussed in FIG. 12. In one embodiment, the size of the third shim 58
may refer to the thickness of the third shim 58.

[0033]The impeller 62 may include any suitable device for pumping coolant
into the housing 30. In a further embodiment, the impeller 62 may further
cause the coolant to exit the housing 30 through one or more exit
passages (shown in FIG. 17) so that the coolant may be used to cool
another system. In one embodiment, the impeller 62 may include any
suitable impeller for use in a CLET pump for a radar system for a Patriot
missile system. In another embodiment, the impeller 62 may include any
other suitable impeller. For example, the impeller 62 may be an impeller
for a pump that provides coolants to an automobile engine, an oil rig
motor, or any other suitable device that generates heat. In one
embodiment, the impeller 62 may be rotated by the motor shaft 22 and the
motor 14. In such an embodiment, the impeller 62 may create a pressure
differential in the coolant in the pump manifold well, causing the
coolant to be pumped up from the pump manifold well, through one or more
holes (not shown) in the impeller 62, and into the housing 30.

[0034]The fourth shim 66 may include any suitable element for preloading
the second seal 50 and the first seal 38 of the pump system 10. In one
embodiment, the fourth shim 66 may include any suitable shim for use in a
CLET pump for a radar system for a Patriot missile system. In another
embodiment, the fourth shim 66 may include any other suitable shim. For
example, the fourth shim 66 may be a shim for a pump that provides
coolants to an automobile engine, an oil rig motor, or any other suitable
device that generates heat. In one embodiment, the fourth shim 66 may be
installed in-between the motor shaft 22 and the mounting hardware 70, as
is illustrated in FIG. 1. In one embodiment, by preloading the second
seal 50 and the first seal 38 of the pump system 10, pressure may be
applied to the second seal 50 and the first seal 38. According to one
embodiment, the pressure may cause the contractible portion 40 of the
first seal 38 to contract, causing the first seal 38 and the second seal
50 to form a better hydrodynamic seal. As such, coolant leakage may be
minimized. In another embodiment, the fourth shim 66 may further alter
the vertical location of the impeller 62. In one embodiment, the fourth
shim 66 may include any suitable size, shape, or material type. In a
further embodiment, the size of the fourth shim 66 may be calculated, as
is discussed in FIG. 15B. In one embodiment, the size of the fourth shim
66 may refer to the thickness of the fourth shim 66.

[0035]The mounting hardware 70 may include any suitable device for
coupling the impeller 62 to the motor shaft 22. In one embodiment, the
mounting hardware 70 may include any suitable mounting hardware for use
in a CLET pump for a radar system for a Patriot missile system. In
another embodiment, the mounting hardware 70 may include any other
suitable mounting hardware. For example, the mounting hardware 70 may be
mounting hardware for a pump that provides coolants to an automobile
engine, an oil rig motor, or any other suitable device that generates
heat.

[0036]As is discussed above, FIG. 1 illustrates one embodiment of the pump
system 10. In one embodiment, the pump system 10 may be a system that is
re-built from a prior system. For example, in an embodiment where the
pump system 10 pumps coolant for a radar system of a Patriot missile
system, the radar system may already have a pre-existing pump system. As
such, in one embodiment, the pump system 10 may include a re-built
version of this pump system. In a further embodiment, the pump system 10
may include an entirely new pump system. For example, the pump system 10
may be built from scratch.

[0037]Although FIG. 1 includes four different shims (e.g., first shim 18,
second shim 34, third shim 58, and fourth shim 66), the pump system 10
may include any other suitable number of shims. For example, the pump
system 10 may include fewer than four shims, or more than four shims. For
example, in an embodiment where the motor shaft 22 is manufactured to its
designed height, the pump system 10 may not include the first shim 18. As
such, the housing 30 may not be vertically displaced in relation to the
motor shaft 22. In a further embodiment, although FIG. 1 illustrates the
four shims located in particular locations of the pump system 10, in
further embodiments, the shims may be located in any other suitable
locations in order to compensate for various manufacturing
inconsistencies.

[0038]Modifications, additions, or omissions may be made to the pump
system 10 without departing from the scope of the invention. The
components of the pump system 10 may be integrated or separated.
Moreover, the operations of the pump system 10 may be performed by more,
fewer, or other components. For example, the operations of the spacer 46
may be performed by more than one component. As used in this document,
"each" refers to each member of a set or each member of a subset of a
set.

[0039]FIGS. 2-17 illustrate particular embodiments of various calculations
and installation steps for the pump system 10 of FIG. 1.

[0040]FIG. 2 illustrates particular embodiments for measuring the motor
shaft 22 and the slush plate 26. In one embodiment, the slush plate
height (SPH) of the slush plate 26 is measured, as is illustrated. In one
embodiment, the SPH may be used to calculate the size of the first shim
18, as is discussed in FIG. 6. In another embodiment, the slush plate
shoulder (SPSH) of the slush plate 26 is measured, as is illustrated.
According to one embodiment, the SPSH may be used to calculate the size
of the first shim 18, as is illustrated in FIG. 6. In a further
embodiment, the motor shaft diameter (MSD) of the motor shaft 22 is
measured, as is illustrated. In one embodiment, the MSD may be used to
select the second high temperature o-ring 54, as is illustrated in FIG.
14B.

[0041]In a further embodiment, the motor shaft 22 may be inspected for one
or more scratches. In one embodiment, the scratches may be polished out
using sandpaper. For example, the scratches may be polished out using any
suitable sandpaper grit, such as, for example, 800, 1000, 1500, or any
other suitable sandpaper grit. In a further embodiment, if the motor
shaft 22 exhibits excessive scratches, a different motor shaft 22 may be
selected for the pump system 10.

[0042]FIG. 3 illustrates particular embodiments for measuring the housing
30. In one embodiment, the slush plate well (SPW) of the housing 30 is
measured, as is illustrated. In one embodiment, the SPW may be used to
calculate the size of the first shim 18, as is illustrated in FIG. 6. In
a further embodiment, the slush plate shoulder well (SPSW) of the housing
30 is measured, as is illustrated. In one embodiment, the SPSW may be
used to calculate the size of the first shim 18, as is illustrated in
FIG. 6.

[0043]In one embodiment, the lower seal diameter (LSD) of the housing 30
is measured, as is illustrated. In one embodiment, the LSD may be used to
select the first high temperature o-ring 42, as is illustrated in FIG.
4A. In another embodiment, the lower o-ring diameter (LOD) of the housing
30 is measured, as is illustrated. In one embodiment, the LOD may be used
to select the first high temperature o-ring 42, as is illustrated in FIG.
4A. In another embodiment, the upper seal diameter (USD) of the housing
30 is measured, as is illustrated. In one embodiment, the USD may be used
to select the first seal 38.

[0044]In one embodiment, the housing 30 may be inspected for scratches. In
one embodiment, any scratches may be polished using a buffer wheel. In a
further embodiment, if the housing 30 exhibits excessive scratches, a
different housing 30 may be selected for use in the pump system 10.

[0045]FIG. 4A illustrates particular embodiments for measuring the housing
30. In one embodiment, the lower o-ring well (LOW) of the housing 30 is
calculated. In one embodiment, the LOW is calculated using the LOD of
FIG. 3 and the LSD of FIG. 3. In one embodiment, the LOW may be
calculated using the following formula:

LOW=(LOD-LSD)/2

[0046]In one embodiment, the LOW may be used to select the first high
temperature o-ring 42, as is illustrated in FIG. 5. In another
embodiment, the lower seal cross sectional diameter (LOCD) of the housing
30 may be measured, as is illustrated. In one embodiment, the LOCD may be
use to select the first high temperature o-ring 42, as is illustrated in
FIG. 5.

[0047]FIG. 4B illustrates particular embodiments for measuring the first
seal 38. In one embodiment, the seal diameter (SD) of the first seal 38
is measured, as is illustrated. In one embodiment, the SD may be used to
select the first high temperature o-ring 42, as is illustrated in FIG. 5.
In another embodiment, the unloaded seal height (USH) of the first seal
38 is measured, as is illustrated. In one embodiment, the USH may be used
to calculate the size of the second shim 34, as is illustrated in FIG. 9.

[0048]In one embodiment, the first seal 38 may be inspected for scratches
and cracks. In one embodiment, any scratches may be polished. In a
further embodiment, if the first seal 38 exhibits cracks or excessive
scratches, a different first seal 38 may be selected for use in the pump
system 10.

[0049]FIG. 5 illustrates particular embodiments for measuring the housing
30, the first high temperature o-ring 42, and the first seal 38. In one
embodiment, the lower o-ring compression (LOC) for the first high
temperature o-ring 42 is calculated. In one embodiment, the LOC may be
calculated using the LOCD of FIG. 4A and the LOW of FIG. 4A. In one
embodiment, the LOC may be calculated using the following formula:

LOC=LOCD-LOW

[0050]In one embodiment, the LOC may be used to select the first high
temperature o-ring 42. For example, in one embodiment, if the LOC is
in-between 0.010 inches through 0.017 inches, that particular first high
temperature o-ring 42 may be used. As another example, if the LOC is less
than 0.010 inches or greater than 0.017 inches, that particular first
high temperature o-ring 42 may be exchanged for a first high temperature
o-ring 42 that is in-between such measurements. Accordingly, a proper
first high temperature o-ring 42 may be selected for the pump system 10.

[0051]In another embodiment, the seal diameter modification (SDM) of the
first seal 38 is calculated. In one embodiment, the SDM may be calculated
using the LSD of FIG. 3 and the SD of FIG. 4B. In one embodiment, the SDM
may be calculated using the following formula:

SDM=LSD-SD

[0052]In one embodiment, the SDM may be used to select the first seal 38.
For example, if the SDM is within the range of approximately -0.0005
inches to 0.0000 inches, that first seal 38 may be used in the pump
system 10. As another example, if the SDM does not fall within this
approximate range, the SD of the first seal 38, as is discussed in FIG.
4B, may be modified so that the SDM is within the range of approximately
-0.0005 inches to 0.0000 inches.

[0053]FIG. 6 illustrates particular embodiments for determining the size
of the first shim 18. In one embodiment, the slush plate clearance (SPC)
between the slush plate 26 and the housing 30 is calculated. In one
embodiment, the SPC may be calculated using the SPW of FIG. 3 and the SPH
of FIG. 2. In one embodiment, the SPC may be calculated using the
following formula:

SPC=SPW-SPH

[0054]In another embodiment, the slush plate shoulder clearance (SPSC)
between the slush plate 26 and the housing 30 is calculated. In one
embodiment, the SPSC is calculated using the SPSW of FIG. 3 and the SPSH
of FIG. 2. In one embodiment, the SPSC may be calculated using the
following formula:

SPSC=SPSW-SPSH

[0055]In one embodiment, the SPC and the SPSC may be used to calculate the
size of the first shim 18. For example, in one embodiment, if each of the
SPC and the SPSC are greater than or equal to 0.005 inches, the first
shim 18 may not be needed in the pump system 10 at all. As such, it may
not be installed. In another example, if either the SPC or the SPSC are
less than 0.005 inches, a first shim 18 having a size that causes both
the SPC and the SPSC to be greater than or equal to 0.005 inches may be
installed in-between the housing 30 and the motor 14 of the pump system
10. In another embodiment, if it is not possible for the first shim 18 to
cause the SPC and the SPSC to be greater than or equal to 0.005 inches,
the motor 14 and/or the housing 30 may not be used in the pump system 10.

[0056]FIG. 7A illustrates particular embodiments for measuring the second
seal 50. In one embodiment, the face seal height (FSH) of the second seal
50 is measured, as is illustrated. In one embodiment, the FSH may be used
to calculate the size of the third shim 58, as is illustrated in FIG. 12.
In another embodiment, the face seal o-ring groove diameter (FSOGD) of
the second seal 50 is measured, as is illustrated. In one embodiment, the
FSOGD may be used to select the second high temperature o-ring 54, as is
illustrated in FIG. 14B.

[0057]In one embodiment, the second seal 50 may be inspected for scratches
and cracks. In one embodiment, any scratches may be polished. In a
further embodiment, if the second seal 50 exhibits cracks or excessive
scratches, a different second seal 50 may be selected for use in the pump
system 10.

[0058]FIG. 7B illustrates particular embodiments for measuring the spacer
46. In one embodiment, the spacer height (TSH) of the spacer 46 is
measured, as is illustrated. In one embodiment, the TSH may be used to
select the spacer 46. In another embodiment, the spacer diameter (TSD) of
the spacer 46 is measured, as is illustrated. In one embodiment, the TSD
may be used to select the spacer 46. For example, in one embodiment, if
the TSD of the spacer 46 is larger than 0.745 inches, a different spacer
46 may be selected for use in the pump system 10. In another embodiment,
the spacer inner diameter (TSID) of the spacer 46 is measured, as is
illustrated. In one embodiment, the TSID may be used to select the spacer
46.

[0059]FIGS. 8A and 8B illustrate particular embodiments for installing the
spacer 46 around the motor shaft 22. In one embodiment, installing the
spacer 46 around the motor shaft 22 may include installing a connector
74. In a further embodiment, the housing 30 may be installed on the motor
14, with or without the first shim 18, before the spacer 46 is installed
on the motor shaft 22.

[0060]FIG. 9 illustrates particular embodiments for calculating the size
and location of the second shim 34. In one embodiment, the shaft shoulder
height (SSH) between the housing 30 and the spacer 46 is measured, as is
illustrated. In one embodiment, the SSH may be used to calculate the size
of the second shim 34, as is described below. In one embodiment, the
measurement of SSH is made before the second shim 34 is installed in the
pump system 10. In a further embodiment, the size of the second shim 34
is calculated. In one embodiment, the size of the second shim 34 may be
calculated using the USH of FIG. 4B and the SSH described above. In one
embodiment, the size of the second shim 34 may be calculated using the
following formula:

Second shim 34=(USH-SSH)-0.050 inches

[0061]The calculation of the size of the second shim 34 may result in a
positive number or a negative number. In one embodiment, if the
calculation of the size of the second shim 34 results in a positive
number, the second shim 43 may be installed in-between the spacer 46 and
the shoulder 44 of the motor shaft 22. In such an embodiment, the spacer
46 may be removed from the motor shaft 22 prior to the installation of
the second shim 34. In one embodiment, if the calculation of the size of
the second shim 34 results in a positive number, the positive number is
the size of the second shim 34 to be used in the pump system 10. In a
further embodiment, if the calculation for the size of the second shim 34
results in a negative number, the second shim 34 may be installed
in-between the first seal 38 and the housing 30. In one embodiment, if
the calculation of the size of the second shim 34 results in a negative
number, a positive version of that negative result may be used as the
size of the second shim 34.

[0062]In one embodiment, the first high temperature o-ring 42 and the
housing 30 may be installed around the motor shaft 22 prior to each of
the second shim 34, the first seal 38, and the spacer 46 being installed
in the pump system 10. In one embodiment, after the first seal 38 is
installed in the pump system 10, the housing 30 may be removed from the
pump system 10 in order to verify that the first seal 38 is bottomed out.

[0063]FIG. 10 illustrates particular embodiments for determining whether
the calculated size of the second shim 34 is correct. In one embodiment,
the unloaded height (UH) between the spacer 46 and the first seal 38 is
measured, as is illustrated. In one embodiment, if the UH is 0.05 inches,
the calculated size of the second shim 34 may be correct. In one
embodiment, the UH may have a tolerance of +0.010 inches and -0.005
inches. In one embodiment, the calculated size of the second shim 34 may
be correct if the UH falls within this tolerance.

[0064]FIG. 11 illustrates particular embodiments for measuring the total
height (TH) between the spacer 46 and the impeller 62. In one embodiment,
a wear ring 78 may be installed on the housing 30 in-between the housing
30 and the impeller 62. In one embodiment, the wear ring 78 may include
any suitable device for preventing wear of the housing 30 and/or the
impeller 62. In one embodiment, the wear ring 78 may include any suitable
wear ring for use in a CLET pump for a radar system for a Patriot missile
system. In another embodiment, the wear ring 78 may include any other
suitable wear ring. For example, the wear ring 78 may be a wear ring for
a pump that provides coolants to an automobile engine, an oil rig motor,
or any other suitable device that generates heat.

[0065]In one embodiment, the wear ring height (WRH) between the spacer 46
and the wear ring 78 is measured, as is illustrated. In one embodiment,
the WRH may be used to calculate the size of the third shim 58, as is
illustrated in FIG. 12. In a further embodiment, the gap (Gap) between
the wear ring 78 and the impeller 62 is measured, as is illustrated. In
one embodiment, the Gap may be used to calculate the size of the third
shim 58, as is illustrated in FIG. 12. In one embodiment, the Gap may be
0.020 inches. In one embodiment, the TH between the spacer 46 and the
impeller 62 is calculated. In one embodiment, the TH may be calculated
using the WRH discussed above, and the Gap discussed above. In one
embodiment, the TH may be calculated using the following formula:

TH=WRH+Gap

[0066]FIG. 12 illustrates particular embodiments for calculating the size
of the third shim 58. In one embodiment, the lower impeller shoulder
height (LISH) of the impeller 62 is measured, as is illustrated. In one
embodiment, the LISH may be used to calculate the size of the third shim
58, as is discussed below. In another embodiment, the face seal height
(FSH) of the second seal 50 is measured, as is illustrated. In one
embodiment, the FSH may be used to calculate the size of the third shim
58, as is discussed below.

[0067]In a further embodiment, the size of the third shim 58 is
calculated. In one embodiment, the size of the third shim 58 is
calculated using the LISH discussed above, the FSH discussed above, the
Gap of FIG. 11, and the WRH of FIG. 11. In one embodiment, the size of
the third shim 58 may be calculated using the following formula:

Third shim 58=Gap+WRH-(LISH+FSH)

[0068]In one embodiment, the third shim 58 may be selected for use in the
pump system 10 if the actual size of the third shim 58 equals the
calculated size of the third shim 58, plus or minus a tolerance. In one
embodiment, the tolerance may be +0.010 inches and -0.000 inches. In a
further embodiment, if the third shim 58 does not equal the calculated
size of the third shim 58, plus or minus the tolerance, a third shim 58
that does meet this measurement may be selected.

[0069]FIG. 13 illustrates particular embodiments for preparing the
impeller 62 for installation in the pump system 10. In one embodiment,
the impeller 62 may already include a location pin. In such an
embodiment, the location pin may be removed from the impeller 62 and
replaced with a pin 82. In one embodiment, the pin 82 may include any
suitable device that may be inserted into the impeller 62. For example,
the pin 82 may include a case hardened 1/16 inch dowel pin. In one
embodiment, the pin 82 may include any suitable pin for use in a CLET
pump for a radar system for a Patriot missile system. In another
embodiment, the pin 82 may include any other suitable pin. For example,
the pin 82 may be a pin for a pump that provides coolants to an
automobile engine, an oil rig motor, or any other suitable device that
generates heat.

[0070]In one embodiment, the pin 82 may be installed in the impeller 62
between the setting fixture of the impeller 62 and the third shim 58. In
one embodiment, after the pin 82 has been installed, the pin height (LPH)
of the pin 82 may be measured, as is illustrated. In a further
embodiment, once the pin 82 has been installed in the impeller 62, the
impeller 62 and the wear ring 78 may be removed from the pump system 10.

[0071]FIG. 14A and FIG. 14B illustrate particular embodiments for
selecting the second high temperature o-ring 54. In one embodiment, the
upper o-ring cross-sectional diameter (UOCD) of the second high
temperature o-ring 54 is measured, as is illustrated in FIG. 14A. In one
embodiment, the UOCD may be used to select the second high temperature
o-ring 54, as is discussed below. In another embodiment, the upper o-ring
compression (UOC) is calculated. In one embodiment, the UOC is calculated
using the UOCD described above, the FSOGD of FIG. 7A, and the MSD of FIG.
2. In one embodiment, the UOC may be calculated using the following
formula:

UOC=UOCD-(FSOGD-MSD)/2

[0072]In one embodiment, the UOC may have a result within the range of
0.010 inches to 0.017 inches. In such an embodiment, the second high
temperature o-ring 54 may be used in the pump system 10. In a further
embodiment, if the UOC does not fall within the above range, a different
second high temperature o-ring 54 may be selected in order to satisfy the
above range for UOC.

[0073]In one embodiment, after the second high temperature o-ring 54 is
selected, as is described above, the second seal 50 may be installed
around the motor shaft 22 of the pump system 10. In one embodiment, a
lubricant may be applied to the area of the second seal 50 that contacts
the first seal 38, as is discussed in FIG. 1, prior to the second seal 50
being installed in the pump system 10. For example, the lubricant may be
applied to an area of 0.010 inches through 0.030 of the second seal 50.
After the second seal 50 is installed in the pump system 10, the second
high temperature o-ring 54 may be installed in the pump system 10, and
then the third shim 58 may be installed in the pump system 10. In one
embodiment, a lubricant may be applied to the second high temperature
o-ring 54, as is discussed in FIG. 1, prior to the second high
temperature o-ring 54 being installed in the pump system 10. In a further
embodiment, the wear ring 78, the impeller 62, and the mounting hardware
70 may then be installed in the pump system 10.

[0074]FIGS. 15A and 15B illustrate particular embodiments for calculating
the size of the fourth shim 66. In one embodiment, the final unloaded
height (FUH) between the motor shaft 22 and the impeller 62 may be
measured, as is illustrated in FIG. 15A. In one embodiment, the FUH may
be measured prior to preloading the pump system 10 by depressing the
impeller 62 (and causing the first seal 38 to contract), as is discussed
in FIG. 1. In a further embodiment, after the FUH has been measured, the
impeller 62 may be depressed in order to preload the second seal 50 and
the first seal 38 of the pump system 10. According to one embodiment,
once the pump system 10 is preloaded, the final loaded height (FLH)
between the motor shaft 22 and the depressed impeller 62 is measured, as
is illustrated. In one embodiment, the FLH may be used to calculate the
size of the fourth shim 66, as is described below. In a further
embodiment, a preload (Preload) may be calculated. In one embodiment, the
Preload may be calculated using the FUH described above and the FLH
described above. In one embodiment, the Preload may be calculated using
the following formula:

Preload=FUH-FLH

[0075]According to one embodiment, the size of the fourth shim 66 may then
be calculated. In one embodiment, the size of the fourth shim 66 may be
calculated using the FLH discussed above. In one embodiment, the size of
the fourth shim 66 may be calculated using the following formula:

Fourth shim 66=FLH-0.005 inches

[0076]In one embodiment, the result of this calculation may be the size of
the fourth shim 66 that is installed in the pump system 10. In one
embodiment, the mounting hardware 70 and the impeller 62 are removed in
order to install the fourth shim 66. In a further embodiment, once the
fourth shim 66 is installed, the impeller 62 and the mounting hardware 70
may be re-installed on the pump system 10. In one embodiment, installing
the mounting hardware 70 may further include installing a key into the
motor shaft 22.

[0077]FIG. 16 illustrates particular embodiments for measuring the pump
system 10 prior to installing the pump system 10 in the pump manifold
well. In one embodiment, the final height (FH) between the housing 30 and
the impeller 62 is measured, as is illustrated. In one embodiment, the FH
may be recorded on the pump system 10 in order to save the FH for later
use. As such, the measurements and calculations made in FIGS. 2-16 may
not need to be made again. In one embodiment, the compatible pump
manifold well (CPMW) of the pump system 10 may be calculated. In one
embodiment, the CPMW may be calculated using the FH discussed above. In
one embodiment, the CPMW may be calculated using the following formula:

CPMW=FH+0.020 inches

[0078]FIG. 17 illustrates particular embodiments for measuring the pump
manifold well depth. In one embodiment, the pump manifold well includes a
space where the pump system 10 may be installed into. For example, after
the pump system 10 is completely built, or re-built, (as is illustrated
in FIGS. 2-16) the pump system 10 may be inverted and installed into the
pump manifold well. In one embodiment, the pump manifold well may further
include a quantity of coolant. As such, once the pump system 10 is
installed in the pump manifold well, the pump system 10 may pump the
coolant into the housing 30 in order to provide the coolant to another
system, such as a radar system of a Patriot missile system.

[0079]In one embodiment, the pump manifold well depth (PMWD) of the pump
manifold well may be measured, as is illustrated. In one embodiment, the
PMWD may be greater than or equal to the CPMW (discussed in FIG. 16). In
such an embodiment, the pump system 10 may be installed in the pump
manifold well. In another embodiment, if the PMWD is less than the CPMW,
the pump system 10 may not be installed into the pump manifold well. In
such an embodiment, the pump system 10 may be installed into another pump
manifold well that meets the criteria above.

[0080]FIG. 18 illustrates one embodiment of a method 100 for re-building
one embodiment of the pump system 10. Although method 100 illustrates a
method for re-building one embodiment of the pump system 10, further
embodiments of the method 100 may include building one embodiment of the
pump system 10. At step 104, the method begins. At step 108, a first seal
is installed around a motor shaft. In one embodiment, the motor shaft may
include a motor shaft of a cooling liquid electron tube pump. In a
further embodiment, the motor shaft may include a motor shaft of a
cooling liquid electron tube pump for a radar system for a Patriot
missile system. In a further embodiment, the first seal may include any
suitable seal that may form a hydrodynamic seal with a second seal when
the motor shaft rotates.

[0081]At step 112, a second seal is installed around the motor shaft. In
one embodiment, the second seal may include any suitable seal that may
form a hydrodynamic seal with the first seal when the motor shaft
rotates. In a further embodiment, installing a second seal around the
motor shaft may include applying an amount of lubricant to the second
seal in an area of the second seal that contacts the first seal. In one
embodiment, the lubricant may include molybdenum grease. In a further
embodiment, after the lubricant is applied to the second seal, the second
seal may be installed around the motor shaft.

[0082]At step 116, a spacer is installed in-between the first seal and the
second seal. In one embodiment, the spacer may include any suitable
device for dampening vibrations emanating from the motor shaft as it
rotates. As such, in one embodiment, the spacer may allow the second seal
to form a better hydrodynamic seal with the first seal. As such, coolant
leakage may be minimized.

[0083]At step 120, a shim is installed around the motor shaft. In one
embodiment, one or more shims may be installed around the motor shaft.
For example, a first shim may be installed around the motor shaft in a
location in-between a motor coupled to the motor shaft and a housing
surrounding the motor shaft. As another example, a second shim may be
installed around the motor shaft in a location either in-between the
first seal and a housing surrounding the motor shaft or in-between the
spacer and a shoulder of the motor shaft. In such an example, the size of
the second shim may be based on at least a height of the first seal. For
example, the size of the second shim may be calculated as is illustrated
in FIG. 9. As a further example, a third shim may be installed around the
motor shaft in a location in-between the second seal and an impeller
installed around the motor shaft. In such an example, the size of the
third shim may be calculated, as is illustrated in FIG. 12. As another
example, a fourth shim may be installed around the motor shaft in a
location in-between the impeller and mounting hardware installed on the
motor shaft.

[0084]In a further embodiment, a first high temperature o-ring may be
installed around the motor shaft in a location in-between the first seal
and a housing surrounding the motor shaft. In another embodiment, a
second high temperature o-ring may be installed around the motor shaft in
a location in-between the second seal and at least a third shim installed
above the second seal. The method ends at step 124.

[0085]The steps illustrated in FIG. 18 may be combined, modified, or
deleted where appropriate. Additional steps may also be added to the
example operation. Furthermore, the described steps may be performed in
any suitable order.

[0086]Although the present disclosure has been described in several
embodiments, a myriad of changes, substitutions, and modifications may be
suggested to one skilled in the art, and it is intended that the present
disclosure encompass such changes, substitutions, and modifications as
fall within the scope of the present appended claims.

[0087]To aid the Patent Office, and any readers of any patent issued on
this application in interpreting the claims appended hereto, applicants
wish to note that they do not intend any of the appended claims to invoke
paragraph 6 of 35 U.S.C. §112 as it exists on the date of filing
hereof unless the words "means for" or "step for" are explicitly used in
the particular claim.